New Measurements of Photoneutron Spectra investigating specific signatures of Carbon, Nitrogen, and Oxygen.
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| Title: | New Measurements of Photoneutron Spectra investigating specific signatures of Carbon, Nitrogen, and Oxygen. |
|---|---|
| Authors: | Besnard-Vauterin, C.1 (AUTHOR), Rapp, B.1 (AUTHOR), Blideanu, V.1 (AUTHOR) |
| Source: | Radiation Physics & Chemistry. Apr2025, Vol. 229, pN.PAG-N.PAG. 1p. |
| Subjects: | Nuclear physics, Liquid scintillators, Form perception, Electron accelerators, Time-of-flight measurements, Linear accelerators |
| Abstract: | We report new measurements on photoneutron spectra from graphite, glucose, and melamine, revealing distinct signatures corresponding to carbon, oxygen, and nitrogen individual elements. Using a 23-MV electron linear accelerator (LINAC) and EJ-309 liquid scintillators with advanced pulse shape discrimination and pile-up rejection algorithms, we successfully detected fast neutrons from photo-nuclear (γ,Xn) reactions within an intense pulsed photon field. Energy deposition from fast neutrons was unfolded using two well-known independent algorithms ML-EM and GRAVEL. Our findings indicate discrepancies between the experimental results and Monte-Carlo simulations performed with the widely-used code MCNP6, highlighting the need for new data in order to improve the models used for the simulation of photoneutron production. These results have significant implications for various nuclear physics applications, including electron accelerator facilities decommissioning, illicit material detection for homeland security, and global radiotherapy patient dosimetry including neutron dose. • New neutron spectra from photo-nuclear reactions on graphite, glucose, and melamine measured with EJ-309. • Distinct neutron signatures of carbon, oxygen, and nitrogen identified experimentally. • Agreement found between proton recoil spectrometry and former time-of-flight measurements. • Discrepancies between MCNP6.2 simulations and experimental data for nitrogen observed. • Findings impact LINAC decommissioning, radiotherapy, and nuclear security applications. [ABSTRACT FROM AUTHOR] |
| Copyright of Radiation Physics & Chemistry is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 182607727 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: New Measurements of Photoneutron Spectra investigating specific signatures of Carbon, Nitrogen, and Oxygen. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Besnard-Vauterin%2C+C%2E%22">Besnard-Vauterin, C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rapp%2C+B%2E%22">Rapp, B.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Blideanu%2C+V%2E%22">Blideanu, V.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Radiation+Physics+%26+Chemistry%22">Radiation Physics & Chemistry</searchLink>. Apr2025, Vol. 229, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Nuclear+physics%22">Nuclear physics</searchLink><br /><searchLink fieldCode="DE" term="%22Liquid+scintillators%22">Liquid scintillators</searchLink><br /><searchLink fieldCode="DE" term="%22Form+perception%22">Form perception</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+accelerators%22">Electron accelerators</searchLink><br /><searchLink fieldCode="DE" term="%22Time-of-flight+measurements%22">Time-of-flight measurements</searchLink><br /><searchLink fieldCode="DE" term="%22Linear+accelerators%22">Linear accelerators</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We report new measurements on photoneutron spectra from graphite, glucose, and melamine, revealing distinct signatures corresponding to carbon, oxygen, and nitrogen individual elements. Using a 23-MV electron linear accelerator (LINAC) and EJ-309 liquid scintillators with advanced pulse shape discrimination and pile-up rejection algorithms, we successfully detected fast neutrons from photo-nuclear (γ,Xn) reactions within an intense pulsed photon field. Energy deposition from fast neutrons was unfolded using two well-known independent algorithms ML-EM and GRAVEL. Our findings indicate discrepancies between the experimental results and Monte-Carlo simulations performed with the widely-used code MCNP6, highlighting the need for new data in order to improve the models used for the simulation of photoneutron production. These results have significant implications for various nuclear physics applications, including electron accelerator facilities decommissioning, illicit material detection for homeland security, and global radiotherapy patient dosimetry including neutron dose. • New neutron spectra from photo-nuclear reactions on graphite, glucose, and melamine measured with EJ-309. • Distinct neutron signatures of carbon, oxygen, and nitrogen identified experimentally. • Agreement found between proton recoil spectrometry and former time-of-flight measurements. • Discrepancies between MCNP6.2 simulations and experimental data for nitrogen observed. • Findings impact LINAC decommissioning, radiotherapy, and nuclear security applications. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Radiation Physics & Chemistry is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.radphyschem.2025.112566 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Nuclear physics Type: general – SubjectFull: Liquid scintillators Type: general – SubjectFull: Form perception Type: general – SubjectFull: Electron accelerators Type: general – SubjectFull: Time-of-flight measurements Type: general – SubjectFull: Linear accelerators Type: general Titles: – TitleFull: New Measurements of Photoneutron Spectra investigating specific signatures of Carbon, Nitrogen, and Oxygen. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Besnard-Vauterin, C. – PersonEntity: Name: NameFull: Rapp, B. – PersonEntity: Name: NameFull: Blideanu, V. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 0969806X Numbering: – Type: volume Value: 229 Titles: – TitleFull: Radiation Physics & Chemistry Type: main |
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